n A store of things that may be required in the future, which can be retrieved rapidly, protected or hidden in some way.
n (computing) A fast temporary storage where recently or frequently used information is stored to avoid having to reload it from a slower storage medium.
n (context|geocaching) A container containing treasure in a global treasure-hunt game.
v To place in a cache.
v (context|Marijuana smoking) For the herb in a bowl to be entirely burnt to ashes and therefore having become empty, gone, or useless for further smoking